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Caffeine and Commerce

Caffeine Checkout Suite · Experiments

In Shopify App Store reviewEvery Shopify plan

A/B tests that measure revenue, not clicks

Every shopper is assigned to a variant by a deterministic hash, the same on the storefront and on the server, so a shopper sees the same variant everywhere, and an hourly check pauses a test whose split drifts. Results report revenue per visitor, conversion rate or average order value, with the statistics shown rather than a single winner badge.

New experiment

Running
TypeCheckout block content
Primary metricRevenue per visitor
StatisticsSequential (mSPRT)
Control50%
Variant A50%
Illustration of an experiment's setup

Where it shows

  • Storefront tests run through the Experiments app embed in your theme
  • Checkout block and post-purchase tests run inside those surfaces

What you can test

  • Storefront CSS, feature flags and redirects
  • Checkout block content
  • Recommendations and Bundle Builder
  • Bundle discount depth
  • Post-purchase offers, assigned per order

Setup

  • Two to six variants with one control and weights that add to 100
  • Target new or returning visitors, desktop or mobile, markets and page types
  • Schedule a start and an end
  • A sample-size estimate for every test

Statistics

  • Fixed-horizon tests: two-proportion z-test for conversion, Welch's t-test for revenue
  • Sequential tests (mSPRT) that stay valid when you check early
  • Probability to beat control alongside confidence intervals
  • Sample-ratio mismatch checks hourly; a test with a broken split pauses itself

How it is measured

  • Revenue per visitor, conversion rate or average order value as the primary metric
  • Accept rate for post-purchase tests
  • Results refreshed hourly and nightly

Good to know

  • Checkout upsell tests are not available yet
  • Storefront tests need the Experiments app embed in your theme

Request access

Put the suite on your checkout.

Caffeine Checkout Suite is in Shopify App Store review. Request access and we will set your store up with you as soon as it is approved.